Cita APA (7th ed.)

Chhatwal, G. R., Mehra, M. C., & Katyal, T. (1989). Environmental Air Pollution and Its Control. Anmol Publications Pvt Ltd.

Cita Chicago (17th ed.)

Chhatwal, G. R., M. C. Mehra, i T. Katyal. Environmental Air Pollution and Its Control. New Delhi: Anmol Publications Pvt Ltd, 1989.

Cita MLA (9th ed.)

Chhatwal, G. R., et al. Environmental Air Pollution and Its Control. Anmol Publications Pvt Ltd, 1989.